Finding the Fourth Proportional to 42,728.76, 64,103.76 and 17,761.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,728.76 : 64,103.76 = 17,761.32 : x
2. Step 2: Convert to fraction form
   42,728.76/64,103.76 = 17,761.32/x
3. Step 3: Cross multiply
   42,728.76x = 64,103.76 × 17,761.32
4. Step 4: Simplify right side
   42,728.76x = 1,138,567,394.56
5. Step 5: Solve for x
   x = 1,138,567,394.56/42,728.76
6. Step 6: Final answer
   x = 26,646.39